Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eda25580e191d51922072b51ff0a2194e984790e4db3f0cc86827bfabf18b158' 
  AND token = 'tnqS/1FVflfyfdtILuImrvXTYRCM/9szrZWVoRfInA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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