Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3592f6d9acc636c766b1a677af21cbe330dd030eee86a695a26952acc31fb8f2' 
  AND token = 'wdSDfEfTG3z3t4dl8O8K5b8dGfrQLXzN2VncoyJ3uh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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