Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac0edd5d788fc68b990964819e1c25f1361094810da9fcb205aaaef39aaa33d2' 
  AND token = '00DKtUsw2pVhhDUGcglG8042fXp+KyoWC26UYD9DBC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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