SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '067f992a5c1dc4486692cfbfcc6428e9849a14ceee25352c4f985126d7d89a3b' 
  AND token = '1pTZWnPGhwKvTIn/cV8C4CvdV2dc5H83q7ZX87qhzjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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