Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f88dba1f0e0f6fc2696a5be4947c4517056036dbba09ac32fe09566032274d7d' 
  AND token = 'AnJ0fawSylvdbhFw5dNA+zvkPFctA/QekJV6BJHCeis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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