Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df9952344dcf3a5f5300b60d91cf02ad480b9f97fad48b07d10c0b48e3b82c03' 
  AND token = '5VnGtzHNGcw8NEm6gDXbJSK1i5dVVZ88KCoHybP3XHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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