Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc29ce1df15d95eba79e638aa204ea75c26b873399c88c01e2f3733713d7dec5' 
  AND token = 'RyJXD4OPvtC8kx5liYxlEHeGTZBaJMKA5K2lXKA7FHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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