Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e109e4c59bd8b003afa725c28485f78323ea35d4620c49ad070c8e0a4199d33d' 
  AND token = 'YQl6ZxlO4qhydmwkJv0ZjF2826d42Qh6r5f4aLd67so=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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