Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cb2b737ffd9d0b3a407b7c07ad901d630f9ab2c4996318cac696e9f3e825a14' 
  AND token = 'c7VQwLbFze8yfHGOONE9qamVtbnzDsZrxFOtLe5zi/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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