Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e76ab4cf47072635bc617897348fe4df6c98d4742fec75c8cd2bd7fa8d9cd749' 
  AND token = '4H7HaNdg2boAQsQjUKvDml1PKTwXb2OS2Vzh7v1psh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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