Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a05f9d52092276345c640f07ab934ae2d3adb013e530834ca286c164a2088edb' 
  AND token = 'xZkFuVIw4IjfB0Qk6suv+C+Cf/lYXk5fumgn1x4++E8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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