Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2638f0940a633a50edef80ca7add5889dd84613884305de2c39b1ca88c179736' 
  AND token = 'lVJgGe+1uopXpd1VznwBaydLWeCAlaAbC8XR9o7g6H8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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