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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '011c69a81e429b767a8f8487a5ad6b9276d3c96a6ed8e75d1e1d67c52fd7a064' 
  AND token = 'AJatvFvrRpVSSx19xUAddAm9PRVu2vW1n0WuH7hhEXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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