Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7bc2d01dd6356502221a4bc4337a86aba708e227e9d20d397d5e6ca09d96b64' 
  AND token = 'OKyjJVwNrbA5i6wtVaJMQotnLg43KM/tZl3r5JnmYmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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