Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83844fbc1559929d6e68988817b3864737e911332b6f98cca79705b4a2453915' 
  AND token = 'X+o6oedn+1dwqO5vCETXVSArQfFP89feAgRyCrYRh7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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