Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45fc5b0134c6f7e0030a8c9070dd1e91fefda03efa7c99550c176c227640afaf' 
  AND token = 'cPh/bsq6rTbTzpf1IaSvadfbNsMiJtI2Ly4aKMt1rl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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