Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd030e1a9b2fd2ffc04f56bba674e8b49cda02d93a1bcc13accdb621dd7402c07' 
  AND token = 'ecQtBGWltoDn2pKmUZeHhgeBwevPLvlawIRPybACj7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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