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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9211e9980fca711926e71723f9b0ed27e3a02e40331c6ee93cce8d189472c709' 
  AND token = 'Um49fr3J5KxeeLClhZz6NVxJBb7D78sL6f9vz64eGN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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