Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b1d131df7c328fb67d11c8d6eb86b9be9a317c2bab0dc5c66df838a83029442' 
  AND token = 'v8E/rwzTHz9f+Myd12kwNXKHIpwdNY1j/JYUSSZaypE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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