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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18a677144c4f1297c3539ea6923c4cef4212a856faca85a82aa4ab26023053af' 
  AND token = 'SeEOy4ZOTa0f+e7xIpe7rg5d1j6Ee9RVCrT7xUiID6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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