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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06dcdae5a229a673274b1269a9b63ca46de7b7c28152d1f8ec2004a757a5ff9f' 
  AND token = 'CzYyDuLgCjO0xgJZPA69wLaH2NVRt9QoyS7DaQ7L3iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}