Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b0f89da276ba182402419de2e7147b080e2f20983da57204032a146a0841844' 
  AND token = 'VxMdmSYTswuWl25Xi0FmubE8vkpCGizGFUCgYzG4SQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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