Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58e2c4d885582833f7ad83a0cfe1eceeb09578f53a0b1d9b78946e11c10e0489' 
  AND token = 'D7flx2MA6Dz/DHEzSCAQJZWYv2uctAhbNLggSJOKhFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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