SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bd49d25eea98f55f83d06c709c7ec2d48ebc0c65dc6b9a92df854f4846cc0b4' 
  AND token = 'Jsw5p4vGTnEvfjeKYJ0EOgVlZl13PJzMes/qPG2kyVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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