SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c5d781131d5182e5c6b929a39d9933b5b8e428acbbb42b2dc518653708988ae' 
  AND token = '7GMVvSfV+rvpEBna3+0/4jzj3HPxZyVZH1Z7iXskAxg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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