Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '216708cdb4a3ea4585ff7bc9d5320b6cfa742e7f6cad90345fd038f5ea4d507c' 
  AND token = 'slLXbpwF32hCWB+WrdpEmAiyVXKbnbqYA8cyc1SNnkU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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