SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2cdd15ee6478314733313655877d6b633ca75f9ac6b34c058db0ea801d303c7' 
  AND token = '9uYl33pBFv+V435W8w0htEjdd9M6v77cLq/spe1NK38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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