Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9724760b36a3004cf93467fae162af68e1b440acf0b5bf95dbe7447a6cd46204' 
  AND token = '2Bp7Pp0Jx9tJnywB8monT2qABUiXhVEjdDoPQnREv3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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