Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f73772a2679615e7efe2b10685bc5c20564b5c071dcefc79811a4f7e0e4711a' 
  AND token = 'uD/MBDLS55IcizlgBFieKJJj0u+Jhdj7aDnY7yMIUAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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