Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2c9ef6f816c9ea775c61af8db1e12c317cd31b2c64dbf27743f05bad5262e21' 
  AND token = 'O9FdQLfEpEjpf369p0VJbhlDS2J3aA6QTRmXXjUTbFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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