Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4528e20de2e3f02d9429ba48bad49e792a6a0f94cd4aaad38abd4b6217d6290d' 
  AND token = 'IAbyUSYrn4ThCnz987RgkojzPEMeYJzDfuFhMw/S9jI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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