Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80f41bbbb885a9c5ef1a73a34152351d3153450f63596d44c52622cdd123f6ac' 
  AND token = 'S6OUa/16QaZ2P8lCMRb5GP/q4Ucxo6xkgjf/VrKHBfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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