SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f54fb80e12be3921e9094b6d27fcb39ec60f1fca22c31f3da3c21ca6753ebb26' 
  AND token = 'hSs8jz4IdD4RPtVJOBy4YKJF+Exkw+Nb7QqWP8NEMVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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