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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bff3862c25c74c1f5dc315fd05a9b4d527b9bcb0622d911ff0a455eaab7f72eb' 
  AND token = 'zoWAUA+GVLAU2C/SMmOh1v5JMVGXUkFUz34hUQ0CJeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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