Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99e3e11f8f4568e2b358b7b24d69316b05f7728adcb390c85d373431a7215a41' 
  AND token = 'NK0ZBakjwh1D1vBCrTUkidVOW+USbrec9Cr20Pn1GFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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