Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25df0454976b94d0f73c31d20b195ffb3896da1830c6e2a0e18df2ee9d204c85' 
  AND token = 'JwMUbFOgzh1tk+U+UH6SyNXx5oIKbg/uhowUt3b1dc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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