Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9029b04f45b55f97a377d7e68677a1992cf1bdd78d8b4b2a30d417088026467d' 
  AND token = '9hjhAi2NfzWXxAGhpzIaCx7DubiKdmrqwBbLUdbL2Q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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