Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1212e55705365ff3dbf111ecdea47b64e0e135bd744d2ddaf9a96a0b50c789b2' 
  AND token = 'U5yZ0o30iPsyFIa0CL+fZGsEEC90WDHLl2e+9o3GXgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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