Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a0ce8075b8eae6932dfed9875c38be1804aae38f65be8fd4c6000be2fe0af6f' 
  AND token = 'jx5+QzcG2SDSg6G9fBL24wwUrunyvOu9DnLw4uJJxRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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