Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '3472fc607ce096db37676bbcaac5dc01b23bab690f9b83d8be0a26a67096abb3' 
  AND token = 'rFmdtkEHmI3T3+cCDLmX2qzvn8rQ9+OoMfVPlZkFDkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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