Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1acced6bc17854a7d3d8610ce6cd272626d79e5e222a20c60c571ebe79b9553f' 
  AND token = 'tpQxex64ulgY2YanR9eXWKijL76xk9UR97b3AOrwtN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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