SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2abe50585269d67eb3127166c74a1215a0fa7243b702362c8f3d213aaf081c3b' 
  AND token = 'XsmaMaXDs+ghjgaypDsFZJIV0Bx/aAlOuwS3GjhPXO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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