Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cdf25f5ba649a0dcdfaaae2b4de16d591fac174a39306a21189471d4d045c4b' 
  AND token = 'fdOBMz9X6x7TuCDuthE1n+vvhfUVhZRq0O6PShnozO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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