Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7031e32442b55ab26d905255ab4baba1843395d2d3472b4f4adfa936584f3b7b' 
  AND token = 'MvbzkP2/849dR6nSaoMBcuIxk/P1GGWLbWGBNLw7Dw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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