Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35afa0e5e0325d91c78478b6329ff1c3cfa66ab12dceff01172861f5ca2799d5' 
  AND token = '8rQbf7mHlivpDirTt4Z4uDfpdRFYb99I5AUu1XP5eBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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