Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4f5130c3f2d2514f0508452c44d2142faa6e2f747ea645d1edfc7deb3726cea' 
  AND token = 'OaJnfZGAsNJI8WM7EsatZt9GMm0gXGLWMN2B3lYmN08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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