Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db67588d92cb2b995653d34f3fe1e3ccdbf46080833bb2108c3bc723c9fedba4' 
  AND token = 'uQyr/gngUFGsIaAS/S+pT7eeA5zcJrhL+LeHubyLGPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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