Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '645ef96cd671e6258f265bd0115ed41f12f1bcd00c0e01cbf9ea666eb2698d63' 
  AND token = '1iR7BYcuIloA62f2Gr0IYoRJlSE175s7x1evORdsOlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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