Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45d2cd0e7a396051733fee00f6ba470624123fbdd494ded0ac542f0027659fbe' 
  AND token = 'y5fLoj8DWMZLy6+Myn0lzgFodrTrMUp4xhlxQfnK/DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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