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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccb3864433e39429d3c115c144d060d76cd762dd82a6bdf8248bff8ee4adc3ce' 
  AND token = 'CnySLYkXbaJdGvxY33/V4a8/BOl+mSoZhR+0lLd48sc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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