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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f43760d48d695d91df83b8b6104024d5f784fcfd7d09f5c9133ccabee51224a8' 
  AND token = 'lK0clih/Tgl1cNs2wNTF3fjosDXoS74Jvw0K3pdI2OI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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