Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7ba3fe75c5c8244b63f7235e7f998274e778b10cf8b946b3793ff24c4c4a229' 
  AND token = 'huPSRszc+5TC5o42T5IJXXl58r3R70hOCfKKEFVSHDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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