Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e884776c03282aaaa70a4201c91412db865ddd3125120f096c943026379a4834' 
  AND token = 'Z/94QelH2Byj4/kN66S6ConESuQ24sfJQgmfJDg+VZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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