Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cc389a121426f9d24ff969bd42542e29379dbcfb67b4bc43aca0d372ee31cda' 
  AND token = 'gHmaMHI1q3EZJwpJIONwdKTLf7SH3k4LMTDIl9hJjFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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