Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98ad576eca00c26d79c1089807f0f890bdd9b47176ed4640bfa3ee9f981ddb17' 
  AND token = 'c3aximIZtHKCUMzh8Yfp9/6meQk8KsTNFyAU2nHM/DI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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