Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '682409ceef0dba1c7b42f2deccf75d15df6a4b17f2b0801e61c20aad6e47d109' 
  AND token = 'MflW6/xOOoGREft7KsNZeHYlRc+Cybm3x9+qP7eV0xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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