SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '201c5acd64cf5943bf20b31868673702ab1f90e84705786742c8206d6d4ab106' 
  AND token = 'ruX3zvpqYytkmVOIVtbKTDB4FWRVRP0/hWBSKHxVjz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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