Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb273080fb7b1e3a0d8e53f058afbcdc11905c2fdca9b6e6ff1939f58ba2cc5c' 
  AND token = 'pdYteHN0iNpzlo+bBt3P2LcTzjFJS93o7anjDaHo4+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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