Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd512192cd602559d36d409ef75dda3238c2c5e8bd26f05784f65dfa6a18f5b0c' 
  AND token = '7gL19gg9rFHa71hgOfyasQ+0TrERKScuKL8RP2GdYDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}