Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bce4abfbf07303792e24a67c07b0ca05a08dc81f91c3791dbcfcd36a1a345615' 
  AND token = 'vijRcS6nQiPE2quyADty4c4luetySpRWJREfpT5t5Mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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