Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0c1e127f30834797eae4c450397894caeb5bd2cf3eadcf6779ce71f1a08df6a' 
  AND token = 'SmKOHbsZuwPRGHX3nMIvL+xq7Jt14kc5fcXwky4CjXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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