Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d7150dd5853f0b4c126bc6693d4a587470dc49fc26b13194dac4a0a195b17b1' 
  AND token = 'CrNEYBZGn4+53dbyQnnFCK5EdC5JsoA9WjV8pgGE+V8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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