Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2a7ad2bf3ebc5d00903868b26ff79fc93cedb9dd22a82c451b00a2924cd643b' 
  AND token = 'QJbEQfK9kis3sOe53fRoQ/G1/suR/w1MUIal+onAo3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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